21565120

素因数分解:

$2^6\times 5^1\times {\mathrm{67391}}^1$

素因数の和:67408

約数の個数: 28

約数和(自身を含む): 51352704

約数和(自身を除く): 29787584

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 67391, 134782, 269564, 336955, 539128, 673910, 1078256, 1347820, 2156512, 2695640, 4313024, 5391280, 10782560, 21565120]

約数ペア:

[(1, 21565120), (2, 10782560), (4, 5391280), (5, 4313024), (8, 2695640), (10, 2156512), (16, 1347820), (20, 1078256), (32, 673910), (40, 539128), (64, 336955), (80, 269564), (160, 134782), (320, 67391)]